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| 扩张比指空气滤清器壳体最大直径部分断面面积与进气口断面面积的比值 | |||
| 间距比; 间距系数 | |||
| 间距比 (率) | |||
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spread ratio : 15 phrases in 2 subjects |
| Finances | 7 |
| Securities | 8 |
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